Removed void typedef for GLPatch_t used when HWRENDER is undefined

Apparently all parts of the source code that require GLPatch_t are themselves used only if HWRENDER is defined. Do I need to say more?

Not sure if this will fix Wolfy's latest problem or not though

src/w_wad.h

@@ -16,8 +16,6 @@
 
 #ifdef HWRENDER
 #include "hardware/hw_data.h"
-#else
-typedef void GLPatch_t;
 #endif
 
 #ifdef __GNUG__